package com.example.heipictureserver.aop;

import com.example.heipictureserver.annotation.AuthCheck;
import com.example.heipictureserver.exception.BusinessException;
import com.example.heipictureserver.exception.ErrorCode;
import com.example.heipictureserver.modal.domain.User;
import com.example.heipictureserver.modal.enums.UserRoleEnum;
import com.example.heipictureserver.service.UserService;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

/*
 *@Description 用户权限校验拦截器
 *@Author bwg
 *@Date 2025/1/17 21:52
 */
@Aspect
@Component
public class AuthInterceptor {

 @Resource
 private UserService userService;

 /**
  * 执行拦截
  *
  * @param joinPoint 切入点
  * @param authCheck 权限校验注解
  */
 @Around("@annotation(authCheck)")
 public Object doInterceptor(ProceedingJoinPoint joinPoint, AuthCheck authCheck) throws Throwable {
  String mustRole = authCheck.mustRole();
  RequestAttributes requestAttributes = RequestContextHolder.currentRequestAttributes();
  HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();
  // 获取当前登录用户
  User loginUser = userService.getLoginUser(request);
  UserRoleEnum mustRoleEnum = UserRoleEnum.getEnumByValue(mustRole);
  // 如果不需要权限，放行
  if (mustRoleEnum == null) {
   return joinPoint.proceed();
  }
  // 必须有权限，才会通过
  UserRoleEnum userRoleEnum = UserRoleEnum.getEnumByValue(loginUser.getUserRole());
  if (userRoleEnum == null) {
   throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
  }
  // 要求必须有管理员权限，但用户没有管理员权限，拒绝
  if (UserRoleEnum.ADMIN.equals(mustRoleEnum) && !UserRoleEnum.ADMIN.equals(userRoleEnum)) {
   throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
  }
  // 通过权限校验，放行
  return joinPoint.proceed();
 }
}
